Someone

 for(int i = 0; i < kilde.length(); i++)
        	   {
        		     for(int j = 0; j < inn.length(); j++) 
        		     {
        		           if(kilde.charAt(i) == inn.charAt(j))
        		           { 


        		        	   StringBuffer word = new StringBuffer();
        		  
        		        	   if(word.)
        		        	   {
        		        		   System.out.println(word);
        		        		   
        		        		   
        		        	   }
        		        	   
        		        	   
        		           }
        		           
        		     }